​Experience the thrilling journey of Okino Kazuki, a normal student leading a content life. His world revolves around two important girls: his sister Rinka and childhood friend Sakuragi Otome, who happens to be the envy of all male students due to her remarkable beauty. While Kazuki and Otome are not in a romantic relationship, they share an inseparable bond and enjoy each other’s company. Kazuki is convinced that their close friendship will eventually lead to something more profound, perhaps even marriage. However, everything changes when Kazuki receives a shocking DVD that shatters his faith and unveils a dark secret. Prepare for a rollercoaster of emotions as you dive into this captivating tale.​